District of Columbia v. Helle
Answer:
GLACIAL DEPOSITS
Today, glacial deposits formed during the Permo-Carboniferous glaciation (about 300 million years ago) are found in Antarctica, Africa, South America, India and Australia. If the continents haven’t moved, then this would suggest an ice sheet extended from the south pole to the equator at this time - which is unlikely as the UK at this time was also close to the equator and has extensive coal and limestone deposits. If the continents of the southern hemisphere are re-assembled near the south pole, then the Permo-Carboniferous ice sheet assumes a much more reasonable size.
More evidence comes from glacial striations – scratches on the bedrock made by blocks of rock embedded in the ice as the glacier moves. These show the direction of the glacier, and suggest the ice flowed from a single central point.
I'm from K12 and i'm positive that the Answer is
C: Mediterranean Sea
The answer is Michael Eugene Porter.
He was still a young associate professor at Harvard Business School when he published this research and it was highly influential. Porter's Five Competitive Forces that Shape Strategy is a tool used to analyze competition of an industry. His research was published in 1979.
